However, most nebulae are basically the same, and there aren't huge differences between the densities of different starforming regions. read more
Nebulae is too nebulous a term to provide a specific answer since it basically includes almost all extended Galactic gas and dust structures. The density of the interstellar medium ranges from below 1 particle $cm^{-3}$ to about $10^6$ cm$^{-3}$. read more
Specifically, the new observations show that the density of the laser-emitting gas surrounding the Ant Nebula is 10,000 times higher than that of the gas seen in typical planetary nebulas. This finding suggests that the Ant Nebula is actually home to two stars, since a companion star would help capture the dense gas ejected from the dying white dwarf star, according to the statement. read more